Jiang Luguang, Liu Ye
Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China.
College of Resources and Environment University of Chinese Academy of Sciences Beijing China.
Geohealth. 2024 Jun 6;8(6):e2024GH001034. doi: 10.1029/2024GH001034. eCollection 2024 Jun.
The global COVID-19 outbreak severely hampered the growth of the global economy, prompting the implementation of the strictest prevention policies in China. Establishing a significant relationship between changes in nighttime light and COVID-19 lockdowns from a geospatial perspective is essential. In light of nighttime light remote sensing, we evaluated the spatiotemporal dynamic effects of COVID-19 city lockdowns on human activity intensity in the Zhengzhou region. Prior to the COVID-19 outbreak, nighttime light in the Zhengzhou region maintained a significant growth trend, even under regular control measures. However, following the October 2022 COVID-19 lockdown, nighttime light experienced a substantial decrease. In the central area of Zhengzhou, nighttime light decreased by at least 18% compared to pre-lockdown levels, while in the sub-center, the decrease was around 14%. The areas where nighttime light decreased the most in the central region were primarily within a 15 km radius, while in the sub-center, the decrease was concentrated within a 5 km radius. These changes in both statistical data and nighttime light underscored the significant impact of the COVID-19 lockdown on economic activities in the Zhengzhou region.
全球新冠疫情的爆发严重阻碍了全球经济增长，促使中国实施了最严格的防控政策。从地理空间角度建立夜间灯光变化与新冠疫情封锁之间的显著关系至关重要。基于夜间灯光遥感技术，我们评估了新冠疫情城市封锁对郑州地区人类活动强度的时空动态影响。在新冠疫情爆发前，即便在常规管控措施下，郑州地区的夜间灯光仍保持显著增长趋势。然而，在2022年10月新冠疫情封锁之后，夜间灯光大幅下降。在郑州中心城区，夜间灯光较封锁前水平至少下降了18%，而在副中心区域，降幅约为14%。中心城区夜间灯光降幅最大的区域主要集中在半径15公里范围内，而在副中心区域，降幅集中在半径5公里范围内。统计数据和夜间灯光的这些变化凸显了新冠疫情封锁对郑州地区经济活动的重大影响。
